Gavin's allusion to Greg overextending himself is an example of his pragmatism and balance. Gavin made choices based on being able to deliver, not based on what is ideal. My successes have come from being more like Gavin. My failures have come from being more like Greg.
Fundamentally, Gavin has assigned himself this problem. He is diligently canvassing and curating opinions on the problems and methods of resolving them.
It can be frustrating work, but it is fully necessary.
He is getting a lot of help in this effort so it is not merely a contest of wills and personalities. Also...Both Greg and Gavin are on the same team and not opposed, though their weighting of the priority of tasks may differ, so it is not really so much a matter of winner/loser.